Determination of 241Am/243Am ratios

S. Aggarwal; D. Alamelu; P. Shah; N. Mirashi

doi:10.1007/s10967-007-0946-y

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 273: Issue 3

Determination of ²⁴¹Am/²⁴³Am ratios

Authors:

S. Aggarwal

S. Aggarwal Bhabha Atomic Research Centre Fuel Chemistry Division Mumbai 400 085 India

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D. Alamelu

D. Alamelu Bhabha Atomic Research Centre Fuel Chemistry Division Mumbai 400 085 India

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P. Shah

P. Shah Bhabha Atomic Research Centre Fuel Chemistry Division Mumbai 400 085 India

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N. Mirashi

N. Mirashi Bhabha Atomic Research Centre Fuel Chemistry Division Mumbai 400 085 India

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Pages:: 771–774

Online Publication Date:: 17 Jun 2007

Publication Date:: 01 Sep 2007

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-007-0946-y

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Abstract

Determination of ²⁴¹Am/²⁴³Am ratios is required for vanous purposes including assay of Am by isotope dilution techniques. Alpha-spectrometry on electrodeposited sources is a preferred technique for this determination. However, there is an inherent problem of tail contribution which necessitates the use of suitable algorithms to account for the same. Recently, in the frame of a Coordinated Research Program (CRP) of the International Atomic Energy Agency (IAEA), WinALPHA software has been developed which is a combination of an asymmetrical Gaussian for the main part of the peak and a low energy function. Therefore, it was of interest to compare the use of this algorithm with the routinely used method, in our laboratory, based on geometric progression (G. P.) decrease. Since, there are no reference materials available commercially for ²⁴¹Am/²⁴³Am ratios, synthetic mixtures covening a wide range (0.3 to 2.0) of ²⁴¹Am/²⁴³Am α-activity ratios were used and un-ignited electrodeposited sources were prepared for α-spectrometry. The α-spectra obtained using PIPS detector, were evaluated using the two algonthms The ²⁴¹Am/²⁴³Am α-activity ratios obtained were also compared with those determined by thermal ionization mass spectrometry (TIMS). An agreement of about 1% was obtained in the ²⁴¹Am/²⁴³Am ratios determined by the two methods and also by using the two algorithms for α-spectrum evaluation.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)